MESON Chess Problem Database
Problem Display
PID: 11723 (4NK2/4RP2/q2p3B/1b3k1B/r3p1N1/r3p3/1bPP3p/7Q w - - 0 1)
Hoffmann, Fritz
5th HM., Main-Post, 1971
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qb7
- 2.Sxd6#
- 1...Qa5
- 2.Sxd6#
- 1...Qa7
- 2.Sxd6#
- 1...Ra1
- 2.Sxe3#
- 1...Ra2
- 2.Sxe3#
- 1...Rc3
- 2.Sg7#
- 1...Rd3
- 2.Qf1#
- 1...Rc4
- 2.Qf1#
- 1...Rd4
- 2.Sg7#
- 1...Ra5
- 2.Qxe4#
- 1...Bc1
- 2.Sg7#
- 1...Bc3
- 2.Sxe3#
- 1...Bd4
- 2.Qxe4#
- 1...Bg7+
- 2.Sxg7#
- 1...Bd3
- 2.Sxe3#
- 1...Bc4
- 2.Qxe4#
- 1...Bc6
- 2.Sxd6#
- 1...Qb7
- Tries
- 1.Re5+?
- 1...dxe5
- 2.Sg7#
- 1...Bxe5!
- 1...dxe5
- 1.Qxh2?
- threat
- 2.Qf4#
- 1...Bg7+
- 2.Sxg7#
- 1...Be5!
- threat
- 1.c3?
- threat
- 2.Sxe3#
- 2.Sg7#
- 1...Rxc3
- 2.Sg7#
- 1...Bxc3
- 2.Sxe3#
- 1...exd2
- 2.Se3#
- 2.Sg7#
- 1...Qc8
- 2.Sxe3#
- 1...Qb6
- 2.Sg7#
- 1...Qa7
- 2.Sxd6#
- 2.Sg7#
- 1...Qa8
- 2.Sxe3#
- 1...e2
- 2.Se3#
- 2.Sg7#
- 1...Bxe8!
- threat
- 1.c4?
- threat
- 2.Qxe4#
- 2.Qf1#
- 1...Bg7+
- 2.Sxg7#
- 1...Rxc4
- 2.Qf1#
- 1...Bxc4
- 2.Qxe4#
- 1...exd2
- 2.Qxe4#
- 1...Qb7
- 2.Sxd6#
- 2.Qf1#
- 1...Qc6
- 2.Qf1#
- 1...Qa8
- 2.Qf1#
- 1...Ra1
- 2.Sxe3#
- 2.Qxe4#
- 1...Bc6
- 2.Sxd6#
- 2.Qf1#
- 1...e2
- 2.Qxe4#
- 1...d5
- 2.Qf1#
- 1...Be5!
- threat
- 1.d4?
- threat
- 2.Sg7#
- 2.Qxe4#
- 1...Rxd4
- 2.Sg7#
- 1...Bxd4
- 2.Qxe4#
- 1...Bxe8
- 2.Qxe4#
- 1...exd4 ep
- 2.Sxe3#
- 1...Qb7
- 2.Sxd6#
- 2.Sg7#
- 1...Qc8
- 2.Qxe4#
- 1...Qc6
- 2.Sg7#
- 1...Bd3
- 2.Sxe3#
- 2.Sg7#
- 1...Bc6
- 2.Sxd6#
- 2.Sg7#
- 1...d5
- 2.Sg7#
- 2.Re5#
- 1...Qa8!
- threat
- 1.Re5+?
- Keys
- 1.d3!
- threat
- 2.Sxe3#
- 2.Qf1#
- 1...Bg7+
- 2.Sxg7#
- 1...Rxd3
- 2.Qf1#
- 1...Bxd3
- 2.Sxe3#
- 1...Bxe8
- 2.Qf1#
- 1...exd3
- 2.Sxe3#
- 1...Be5
- 2.Sxe3#
- 1...Qb6
- 2.Qf1#
- 1...Qa7
- 2.Sxd6#
- 2.Qf1#
- 1...Ra1
- 2.Sxe3#
- 1...Bc1
- 2.Sg7#
- 2.Qf1#
- 1...Bd4
- 2.Qxe4#
- 2.Qf1#
- 2.dxe4#
- 1...e2
- 2.Se3#
- threat
- 1.d3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 13
- Sets
- Q(i);N_GUARD::S(I),XP(j)
- R(c);N_GUARD::S(D),XP(d)
- R(c);S_CUTB(a)::S(I)
- R(c);S_CUTB(g)::QAR(A)
- R(e);S_CUTB(g)::QAR(A)
- R(e);S_CUTB(a)::S(I)
- R(e);N_GUARD::QAB1(A),XP(f)
- B(a);N_GUARD::S(I)
- B(a);S_CUTR(c)::S(D),XP(d)
- B(a);S_CUTR(e)::QAB1(A),XP(f)
- B(a);CHECK,N_GUARD::S(I),XB(a)
- B(g);S_CUTR(c)::S(D),XP(d)
- B(g);S_CUTR(e)::QAB1(A),XP(f)
- B(g);S_CUTQ(i)::S(I),XP(j)
- Tries
- Try
- R(G);CHECK
- Vars
- P(j);XR(G)::S(I)
- Refutation
- B(a);XR(G)
- Try
- Q(A);XP(b)
- Threat
- QAR1(A)
- Vars
- B(a);CHECK,N_GUARD::S(I),XB(a)
- Refutation
- B(a);
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- R(c);XP(B)::S(I)
- B(a);XP(B)::S(D),XP(d)
- Q(i);P_PINS(I)::S(D),XP(d)
- Q(i);::S(I)
- Refutation
- B(g);XS(I)
- Try
- P(B);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,N_GUARD::S(I),XB(a)
- R(e);XP(B)::QAR(A)
- B(g);XP(B)::QAB1(A),XP(f)
- P(d);XP(C)::QAB1(A),XP(f)
- Q(i);::QAR(A)
- Q(i);P_PINS(I)::QAR(A)
- P(d);::QAB1(A),XP(f)
- P(j);::QAR(A)
- Refutation
- B(a);
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- R(e);XP(C)::S(I)
- B(a);XP(C)::QAB1(A),XP(f)
- B(g);XS(I)::QAB1(A),XP(f)
- P(f);EP,S_CUTR(c),XP(C)::S(D),XP(d)
- Q(i);P_PINS(I)::QAB1(A),XP(f)
- Q(i);::S(I)
- Refutation
- Q(i);P_PINS(I)
- Try
- Actual
- P(C);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,N_GUARD::S(I),XB(a)
- R(c);XP(C)::QAR(A)
- B(g);XP(C)::S(D),XP(d)
- B(g);XS(I)::QAR(A)
- P(f);XP(C)::S(D),XP(d)
- B(a);::S(D),XP(d)
- Q(i);::QAR(A)
- R(c);::S(D),XP(d)
- P(d);::S(D)
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